CN1427581A - System and method for detecting failure and route reconnection in communication network - Google Patents
System and method for detecting failure and route reconnection in communication network Download PDFInfo
- Publication number
- CN1427581A CN1427581A CN02157144.9A CN02157144A CN1427581A CN 1427581 A CN1427581 A CN 1427581A CN 02157144 A CN02157144 A CN 02157144A CN 1427581 A CN1427581 A CN 1427581A
- Authority
- CN
- China
- Prior art keywords
- mpls
- network
- oam
- communication
- atm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/22—Alternate routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
- H04L45/247—Multipath using M:N active or standby paths
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Environmental & Geological Engineering (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
A method of re-establishing a connection for a communication link is provided. The link has first and second portions, having the first portion in a first communication network, the second in a second communication network and an interface connecting first portion to the portion. The first communication network has a first communication protocol and a first OAM protocol to monitor integrity of the first portion. Similarly, the second communication network has a second communication protocol and a second OAM protocol. The method utilizes the second OAM protocol to detect a failure in the second portion. Upon detection of the failure, an alternate route for the second portion in the second communication network is identified, where the alternate route is able to complete the second portion of the communication link from the interface. For the communication link, at the interface the second portion is replaced with the alternate route.
Description
Technical field
The present invention relates to data communication system, particularly can be provided to the ATM(Asynchronous Transfer Mode) business application of the network node of multiprotocol label switching (mpls) platform.
Background technology
MPLS is supported in the communication industry as the high-speed core of many communication networks rapidly.Be used for the network that atm network is connected with the MPLS network is developed and is provided with.
When the MPLS network is used as atm network a part of, need a kind of system can in atm network, utilize MPLS OAM.
Summary of the invention
In first aspect, provide a kind of method that is used to rebulid the connection of communication link.This communication link has first, second portion in the second communication network in first communication network and the interface that first is connected to this part.The OAM agreement that first communication network has first communication protocol and is applicable to the integrality of monitoring first; The 2nd OAM agreement that the second communication network has the second communication agreement and is applicable to the integrality of monitoring second portion.This method utilizes the 2nd OAM agreement to detect fault in second portion.After detecting fault, this method is discerned the replacement path that is used for second portion in the second communication network, and the second portion from the communication link of this interface can be finished in this replacement path.For this communication link, in this interface, this method replaces second portion with the replacement link.
This method can have first communication network as atm network, as a kind of OAM agreement among PNNI and the ATMOAM, and as the second communication network of MPLS network, and as the 2nd OAM agreement of MPLS OAM.
This method can be replaced the path for this second portion identification at this interface in the second communication network.
This method is used for receiving the second portion of the frame that comprises MPLS OAM information by monitoring and this frame is eliminated shake (debouncing) and can be utilized the 2nd OAM agreement to detect fault at second portion.
This method can be by keeping and visiting a tabulation of replacing the path that keeps for this second portion and discern the replacement path that is used for this second portion in the second communication network.
This method can have an OAM agreement of the fault of the detection of being applicable in second portion.
This method can utilize the 2nd OAM agreement to detect the removing situation of the fault in second portion.After detecting fault clearance, the second portion that this method is used in this interface replaces this replacement path.
In second aspect, provide a kind of network node.This node links to each other with the second communication network with first communication network.This node processing is used for the communication of communication link.This communication link has first in first communication network, the second portion in the second communication network and is in interface between first and the second portion at this network node.The OAM agreement that first communication network has first communication protocol and is applicable to the integrality of monitoring first; The 2nd OAM agreement that the second communication network has the second communication agreement and is applicable to the integrality of monitoring second portion.This node has first module, utilizes the 2nd OAM agreement to detect fault in second portion; Second module is applicable to the reception faulty indication after receiving fault, to discern the replacement path that is used for second portion in the second communication network, the second portion from the communication link of this interface can be finished in this replacement path; Three module is applicable to receive the indication of replacing the path, is this communication link, replaces this second portion with the replacement path.
This node can have first communication network as atm network, as a kind of OAM agreement among PNNI and the ATMOAM, and as the second communication network of MPLS network, and as the 2nd OAM agreement of MPLS OAM.
This node can have first module, be used for receiving by monitoring comprising MPLS OAM information and utilizing the 2nd OAM agreement to detect fault at second portion, and this second module is eliminated shake to this frame.
This node can have second module, wherein further comprises a tabulation of replacing the path that is used for second portion, to discern this replacement path.
This node can have and is applicable to and uses the 2nd OAM agreement to detect first module of the removing situation of the fault in second portion, and is applicable to the three module that replaces this replacement path after detecting fault clearance by the second portion that is used for communication link.
In others, the invention provides the various combinations and the subclass of above-mentioned various aspects.
The accompanying drawing summary
From the description of hereinafter specific embodiment and illustrate by way of example the accompanying drawing of principle of the present invention, above-mentioned and others of the present invention will become clearer.In the accompanying drawings, components identical adopts identical reference number, and this label can have unique letter suffix, to discern the instantiation of similar elements:
Fig. 1 is at the block diagram that has the existing ATM communication network of a faulty link in two nodes known in the field;
Fig. 2 is according to the block diagram that has the atm network that includes the MPLS network of a faulty channel link between two MPLS nodes of one embodiment of the invention in the MPLS network;
Fig. 3 serves as reasons and embodies two atm cells that node adopted among Fig. 2 of the present invention and the block diagram of a MPLS frame of equal value;
Fig. 4 is the block diagram that connects the channel link of two MPLS nodes in the MPLS of Fig. 2 network;
Fig. 5 is the flow chart of algorithm that is used to set up the channel link of Fig. 3;
The schematic diagram of the various situations that Fig. 6 is sent out and monitors for the OAM frame relevant with the channel link of Fig. 4;
Fig. 7 is for embodying the element block diagram of the node that the MPLS network of atm network and Fig. 2 is joined of the present invention; And
Fig. 8 is the block diagram of the MPLS oam state machine in the node of Fig. 7.
Embodiment
Following description and embodiment illustrate principle of the present invention by way of example.These embodiment are provided for the purpose of these principles of explanation, but not are used for restriction.In the following description, components identical is represented by identical reference number in specification and accompanying drawing.
Referring to Fig. 1, shown existing system 100 comprises the atm network of general structure known in the field.Wherein, network 102 comprises interconnected a plurality of ATM switch 104 that connected by the communication link 106 that can carry the ATM business.At the edge of network 102, ATM edge switch 108 is provided for the connection that a client residence equipment (CPE) 110 is connected to network 102.Similarly, in another edge of network 102, ATM edge switch 112 is provided for CPE114 is connected to the link of network cloud 102.Should be known in that this ATM edge switch 108 can also have the connection that is connected to another atm network 116.ATM edge switch 108 is connected to the element in the network 102 by link 118.Similarly, ATM edge switch 112 is connected to element in the network 102 by link 120.
The ATM edge switch has detection and avoids the function of the fault in network cloud 102, uses known pnni signaling or ATM OAM agreement.When example communication by when CPE110 to CPE114 sends, at first set up a pnni signaling path that arrives ATM edge switch 112 from ATM edge switch 108 by ATM switch 104.For example, the initial routed path of setting up by ATM switch 104A, 104B and 104C 122.When path 122 can with and when wherein element fault occurring, the fault in the link 106 that ATM switch 104B is connected to ATM switch 104C for example, PNNI can be used to replace the path along one and rebulid connection.
Simultaneously, this embodiment provides a kind of be used to have connection that arrives atm network and the system and method that arrives the node that is connected of MPLS network, to utilize MPLS OAM to detect and to get around the detected fault of being set up in the path in the MPLS network.Detailed description about the embodiment that utilizes the MPLS network is provided in addition.
Referring to Fig. 2, system shown in it 200 comprises the switch that constitutes an embodiment.At this, MPLS network 202 comprises the MPLS switch 204 that connects by communication link 206.In an edge of network 202, ATM/MPLS switch 208 for example is used to make that the such atm device of CPE210 is connected to network 202.In an edge of network 202, ATM/MPLS switch 212 is provided for a point of interface of the such atm device of CPE214 for example.ATM/MPLS switch 208 has the link that is connected to another atm network 216.ATM/MPLS switch 208 communicates by the MPLS switch in communication link 218 and the network 202.Similarly, ATM/MPLS switch 212 communicates with MPLS switch 204C by communication link 220.Should be understood that network 202 can have other connection that arrives other network.
For service quality (QoS) standard is provided, for example be similar to the standard in the atm network, for the communication of handling by MPLS network 202, MPLS switch 204 utilizes the MPLS signaling to set up to be used for special use and the default routed path in MPLS network 202 loaded service.This routed path is that all elements in network 202 are known.For example, if CPE210 and CPE214 communicate, after data are sent to ATM/MPLS switch 208 from CPE210, use label switched path (" LSP ") 222, by MPLS network 202, these data are sent between ATM/MPLS switch 208 and ATM/MPLS switch 212.LSP222 can also carry from switch 212 to switch 208 data.LSP also is called as routed path.
Another requirement that is used for the QoS standard is that redundant MPLS routed path must be provided.Under the situation that parts in MPLS in the coin path 222 break down, the fault in the communication link 206 that connects MPLS switch 204B to MPLS switch 204C for example, this fault is detected, and traffic carrying capacity is re-routed to one and replaces the MPLS routed path, for example replaces MPLS routed path 224.Provide hereinafter about the detailed description that is used to monitor with the mechanism of route MPLS routed path.
Correspondingly, switch 208 provides an embodiment of the splicing point between ATM and MPLS network, allows in remaining communication network route from every kind of network that will be provided and will be by the employed routing iinformation of other network.Should be known in that switch 208 also is called as node, network element, routing switch or other term as known in the art.
Referring to Fig. 3, shown in it the aspect of changing mutually between the ATM cell that receives from CPE210 by ATM/MPLS switch 208 and the MPLS frame.Should be known in and work as ATM/MPLS switch 208 on the edge of atm network and MPLS network that ATM/MPLS208 must be conversion mutually between ATM cell and the MPLS frame.The ATM data are packaged in cell or the frame.The ATM cell 300 of example be included in the data field 302 48 bytes and in five bytes of header field 304.This header field comprises the data relevant with the error-detecting target information.Usually, ATM cell 300 is used to come encoded voice to call out by AAL 1/2/5 signaling parameter.The ATM frame is used to send relatively large data.The ATM frame 306 of example comprises the data field that may have the 65K byte data.Header field 312 can be compared with the header field 304 that is used for ATM cell 304.The MPLS frame comprises data field 314, header field 316, first label field 318 and second label field 320.
When ATM cell or frame were converted to the MPLS frame, each ATM data field (data field 302 or 308) was inserted into MPLS data field 314.Similarly, the content of each ATM cell or frame header field (header field 304 or header field 310) is inserted into MPLS header field 316.First label field 318 and second label field 320 are used to identify the routing iinformation that is used for MPLS frame 312 to MPLS networks 202.First label field 318 comprises and the relevant identification information of MPLS routed path that is used for the MPLS frame.For example, this first label field 318 can comprise with about the relevant information of the routed path of MPLS routed path 222.Second label field 320 comprises and the link information that can be used for the specific internal ATM join dependency in route ATM path by node 208 and 212.Because this passage is known, each node in network 202 can be checked the content of first label field 318, and this frame is forwarded to suitable node in this network 202.
Referring to Figure 4 and 5, provide the foundation of MPLS routed path 206,218 and 220 and the description of content.In this embodiment, MPLS routed path 206,220 is separated in the optical cable by actual being embodied in 218, and the carrying of each path arrives or from the one-way data of MPLS switch 204 or ATM/MPLS switch 208.Use the example of MPLS routed path 218, carry out in the separation optical fiber connection that is identified as label switched path (LSP) 400 from the downlink communication of ATM/MPLS switch 208 to MPLS switch 204A.Similarly, carried by LSP402 to the communication of ATM/MPLS switch 208 from MPLS switch 204A.Should be known in that LSP400 and LSP402 can be connected to the same physical port of being concentrated on the switch 208 that is grouped into a MPLS passage that constitutes MPLS routed path 218.Should be known in that term " passage " can replace with term " MPLS " routed path.PNNI main line group is created to connect LSP400 and LSP402.In a plurality of main line groups that PNNI main line group can be with a physical port on the switch 208 that is connected to MPLS network 202 links to each other one.This main line group also allows to use p-nni signaling protocol to connect the ATM signal transmission of permission control (CAC) and ATM connection on passage.
Referring to Fig. 5, algorithm shown in it 500 is used for setting up, constructs and monitor a passage, for example MPLS routed path 222 and 224.At first, in step 502, between source and target MPLS switching node, on each direction, create a LSP.In this embodiment, source MPLS node can be an ATM/MPLS switch 208, and target MPLS switch can be an ATM/MPLS switch 212.Then in step 504, two LSP are combined to create a passage.For the network shown in Fig. 2, this passage can be a MPLS routed path 222.Then in step 506, the pnni signaling link that is associated with the ATM data is connected to this passage.Then in step 508, the pnni signaling link that is associated with the ATM data is connected to this passage.At last, in step 510, start channel monitoring.In this point, passage 222 provides ATM/MPLS switch 208 to the communication link between the ATM/MPLS switch 212.Pnni signaling in this passage and routing link make this embodiment use p-nni signaling protocol to detect and any signalling failure in the passage 222 are reacted.But as mentioned below, this embodiment utilizes the MPLSOAM signaling protocol to replace the PNNI agreement as the MPLS signaling protocol, and the response time of improvement is provided.
Should be known in that algorithm 500 can repeat for replacing passage 224, be used for the replacement routed path of ATM/MPLS switch 208 to ATM/MPLS switch 212 with foundation.
Referring to Fig. 4, LSP400 and 402 can carry pnni signaling link data bag, PNNI routing link packet and special-purpose MPLS Operations, Administration and Maintenance (OAM) frame respectively.The MPLSOAM frame is according to ITU MPLS standard Y.17, and it is contained in this for your guidance.Have three kinds by the employed MPLS OAM of present embodiment frame:
1) connectivity is confirmed (CV) frame;
2) defective identifier (BDI) frame backward; And
3) defective identifier (FDI) frame forward.
The type of the MPLS OAM frame that sends in a LSP identifies by the header information in the MPLS frame and second label field 320.Second label field 318 comprises the gap marker information relevant with the OAM target.At present, in the present embodiment, MPLS OAM frame is identified by the defined numerical value of MPLS standard body.Current, this numerical value is " 5 ".This numerical value is placed in second label field 320.The type of the content identification MPLS OAM frame of this numeric field.
Referring to Fig. 6, provide the used in the present embodiment Y.17 description of OAM signaling protocol of ITU by the passage 222 between reference ATM/MPLS switch 208 and the ATM/MPLS switch 212.OAM signaling protocol operation usually is as follows: at a upstream switches, produce an OAM frame, and send to downstream switch in its relevant LSP.At the downstream switch place, the OAM frame is received and analyzes.According to analysis result, downstream switch produces a response OAM frame, and it is upwards sent to the switch of posting a letter along relevant LSP.At this switch place that posts a letter, this response OAM frame is received and analyzes.According to the state of LSP or switch, final response message will be indicated the state of whole passage to this switch of posting a letter.
The state of the components downstream outside this with good grounds LSP400, LSP402, switch 212 and switch 212 and four kinds of signaling OAM situations producing.For these signaling aspects in the present embodiment are described, upstream switches is an ATM/MPLS switch 208, downstream switch is an ATM/MPLS switch 212, the frame module of posting a letter is a sending module 602, receiver module is a monitoring module 604, replying sending module is module 606, and reception answer module is a monitor module 608.
Situation A at 600 places is illustrated in the passage of the problem that do not send in the element of being paid close attention to.In switch 208, in step 1, sending module 602 produces a CV frame, and sends on LSP400.In step 2,, receive this CV frame by monitoring module 604 at switch 212 places.In step 3, this monitoring module is confirmed the reception of CV frame.In step 4, the module 608 at switch 208 places receives this response CV frame.By receiving this response CV frame, switch 208 can determine that passage 222 is available fully.The CV frame by CV sending module 602 and module 608 in per second according to ITU Y.17 standard produce.Correspondingly, after receiving specific transmission and frame processing delay, but, approximately arrive once each second by the 208 response CV frames that received when the complete time spent of assembly in passage 222 and its downstream that influences passage 222.Should be known in and to be used to send the CV frame At All Other Times at interval.
In the situation B at 612 places, suppose in LSP400, to exist a fault.In step 1, CV transmitter module 602 produces and sends its CV frame to LSP400.In step 2, because the fault in LSP400, it will not received by the monitor 604 at switch 212 places.Correspondingly, in step 3, the CV echo sender produces a response BDI frame, and therefore its expression a fault occurred because switch 212 does not receive this CV frame in the reverse transmission link of switch 212.This BDI frame sends on LDP402, and it is received by CV/BDI/FDI monitor module 608 at switch 208 places in step 4.Switch 208 can determine that then passage 222 is not exclusively available, and can make a business switch to the replacement passage.
Situation C at 612 places supposes to break down in LDP400 and LDP402.Correspondingly, for situation B, step 1,2 and 3 is identical.But in step 4, switch 208 will not receive the BDI frame.Correspondingly, switch 208 will be recognized the response that does not have for the CV frame of original transmission, and will switch to a replacement passage from current active tunnel 222 once more.
Situation D (not shown in Figure 6) is a kind of situation A of distortion.Under normal condition, if passage 222 is available fully, then switch 208 and switch 212 can send and receive the CV frame between them.But, if switch 212 has an indication, another fault that promptly has response channel 222 in its downstream, then CV/BDI/FDI respond module 606 produces a FDI frame, and there be an integrity issue relevant with passage 222 in its downstream that is illustrated in switch 212.The FDI frame is sent to switch 208 from switch 212 by LDP401.The FDI frame is received by CV/BDI/FDI frame monitor 608.Switch 208 is discerned the fault of passage 222 then, and can switch to a replacement passage as required.
In addition, provide a signal to eliminate shake mechanism.As indicated above, switch 208 produces and inserts the CV frame in the time interval in a second.In this embodiment, only after not receiving or showing three successive frames of these link existing problems (by BDI or FDI indication), by fault of any receiver module record, to eliminate parasitic signal at random.
Referring to Fig. 7, wherein be illustrated in the details of the switch that continues 208 between MPLS OAM module and the pnni signaling module.Switch 208 comprises ATM processing section 700 and MPLS processing section 702.ATM part 700 comprises connection maintenance module 704 and pnni signaling module 706.ATM part 700 can reside in the central control module of switch 108.MPLS processing section 702 comprises CV frame generator and transmitter 103 and CV/BDI/FDI monitor 608, MPLS link control module 708 and MPLS oam state machine 710.CV transmitter module 602 and CV/BDI/FDI monitor 608 are connected to physical port 712, and it is connected to passage 218, and such work as indicated above.LSP administration module 714 is provided for the interface of the module in ATM processing section 700 and MPLS processing section 702.MPLS processing section 702 can reside in the Line cards of switch 208.In switch 108, can have several Line cards with MPLS processing section 702.
For the function of MPLS, produce MPLS OAM frame by CV transmitter module 602, and on passage 218, send.The MPLS response frame is received from passage 218 by CV/BDI/FDI monitor 608.Then, module 608 is notified to oam state machine 710 to the OAM frame.Oam state machine 710 receives the OAM frame, and determines whether relevant LSP passage is in CV, BDI or FDI state.
Referring to Fig. 7 and 8, oam state machine 710 has three states: unknown state 802, kilter 804 and defect state 806.After initialization, oam state machine 710 is initially located in unknown state 802.
If the connectivity of passage confirms that successfully then oam state machine 710 will switch to kilter 804 from unknown state 802.Can after receiving continuous a plurality of CV packets, confirm successful connection.If connectivity is confirmed failure or BDI or FDI packet and is received that then state machine 710 will switch to defect state 806 from unknown state 802.In carrying out the connectivity affirmation, the CV packet will regularly be received by oam state machine 710, and approximately per second once.But when a period of time did not receive a CV packet later, oam state machine 710 forwarded defect state 806 to.In the present embodiment, if do not receive the CV packet in about 3 seconds time window, then the LSP passage is in the CV malfunction.When receiving BDI packet or FDI in unknown state 802 and state machine 710 at first, then state machine 710 is transferred to defect state 806.
Although in defect state 806, can removal of defects.If cause defective owing to lacking the CV packet, if state machine 710 receives a series of continuous CV packets then, then this defective is eliminated.The number of packet can dispose.If defective since BDI or FDI packet reception caused, if then state machine does not receive other BDI (or FDI) packet in the preset time section, then this defective is eliminated.This determining time can be changed by state machine 710.After removal of defects, state machine 710 is transferred to kilter 804.
In kilter 804, as indicated above, do not receive a plurality of CV packets receive BDI or the BDI packet after, switch to defect state 806.
Referring to Fig. 7, when defective was not eliminated, by producing and inquire about the change of the status item 716 that changes FIFO718, oam state machine 710 sent to LSP administration module 714 to the state of passage 218.Project 716 comprises the information about target LSP and MPLS oam state information, promptly with the relevant information of state of CV, BDI and FDI frame.LSP administration module 714 monitors the new projects of FIFO718 termly.After detecting new projects of existence, LSP administration module 714 which LSP of identification break down, and with representing to exist the message of " link-down (line down) " situation to send to module 706 for this LSP.
Atm signaling module 706 management ATM signals connect, and handle the message that expression comprises the availability of the passage that ATM connects, for example from any " link-down " message of LSP administration module 714.
Signalling module 706 is relevant with pnni signaling module 706B with PNNI routing module 706A.PNNI routing module 706A pro forma interview sheet and database to obtain all known routed paths of switch 108, comprise the path of network 202, for example comprise path 222 and 224.Pnni signaling module 706B management is set up and is removed the message that is connected.When receiving " link-down " message, routing module 706A determines a replacement link for faulty link.In case routing module 706A determines this replacement path, it is notified to signalling module 706B to new route changing.Signalling module 706B sends to a message with new signaling message and connects maintenance module 704.When route is professional from the ATM of CPE210, can use this new signaling information.Signalling module 706B also gives MPLS link control module 708 new PNNI message informing.Correspondingly, signalling module 706B can use atm signaling agreement (for example PNNI) that the calling from node 208 is sent to node 212.In this exchange process, use PNNI to transmit the numerical value that is used for second label 320.
This module of signalisation that is received by link control module 708 disconnects the connection that is used for faulty channel, and sets up new MPLS route on the replacement passage.For example, referring to Fig. 2, after breaking down in path 222, can select to replace path 224.Routing iinformation about new route can also be provided to MPLS link control module 704 by PNNI routing module 706A.Routing module 706A has learnt all paths, comprises the state of all passages and all passages.When sending out suitable data and CV frame in connection 218, MPLS link control module 708 is that first label 318 and second label 320 are determined new label informations then.In link control module 708, comprise that the storehouse 720 of the project 722 of second label field is used to follow the tracks of MPLS routed path main and that replace.This storehouse provides preformed list of labels, and it is used by link control module 704, but so that in case determine current MPLS path time spent no longer, identification is used to replace the new label in path effectively.
The use that should be known in MPLS CV OAM frame provides the fault resolution of a signal, and this signal should be received in each second by the MPLS module in the switch 208.This is with the typical pnni signaling scheme of per 30 seconds fault resolution once and only provide the atm signaling scheme of 60 seconds information resolution once to compare to have advantage.
It hereinafter is the interactive description of signal of the module of the switch shown in Fig. 7 208 under the situation about in LSP400, breaking down.In the situation C of Fig. 6, switch 208 stops to receive the CV frame.Correspondingly, oam state machine 710 does not receive the CV frame.After losing frame continuously, i.e. in 3 seconds, state machine 710 determines that the LSP passage breaks down.Correspondingly, state machine 710 sends to LSP administration module 714 to a MPLS OAM CV fault detection message.
LSP administration module 714 receives fault detection message, and produces and send " link-down " message to this atm signaling system 708.
Atm signaling module 708 receives " link-down " message.Correspondingly, each ATM connection of former operational failure link can not be passed through data now.This atm signaling module 708 sends to MPLS link control module 704 to one " removing connection ", connects to remove MPLS.Atm signaling module 708 is labeled as the current LSP passage 400 that breaks down and is not useable for new ATM connection.
MPLS link control module 704 receives " removing connection " message.It is programmed to CV transmitter 602, with by changing the target message in first label field 318, and stops frame being forwarded to the LSP passage 400 (Fig. 3) that breaks down.
If exist one to replace passage, for example passage 224, and then atm signaling module is operated the LSP passage to the ATM link road by passing through other again.When rerouting was finished, atm signaling module 708B sent to MPLS link control module 704 to " add and connect " message, to allow the professional associated of this replacement passage 224 and ATM.
Action when primary fault is eliminated and oam state machine 710 may be taked by switch 208 when beginning to receive the CV frame is hereinafter described.By the suitable message of inquiry in FIFO718, the first oam state machine 710 sends to LSP administration module 714 to " the CV fault is eliminated " message.Then, LSP administration module 714 receives " the CV fault is eliminated " message, and the LSP that breaks down before determining can work now.Correspondingly, " link operation (line up) " message is sent to atm signaling module 706B.At last, atm signaling module 706B receives should " link operation " message.When being labeled as, the link that broke down in the past can be used for new ATM connection now.Another signal can be provided to the passage of link control module 708 to break down before reusing.
From prior art as can be known, can not in MPLS OAM, use ATM OAM packet.In addition, do not move, then do not have atm signaling can obtain notice about this fault if the MPLS passage becomes.
On certain the level of detail, the foregoing description is described for illustrative purposes.Those skilled in the art should know and can make various modification and change to described embodiment and do not depart from the scope of the present invention.
Claims (12)
1. method that is used to rebulid the connection of communication link, described communication link has first, second portion in the second communication network in first communication network and the interface that described first is connected to described part, the OAM agreement that described first communication network has first communication protocol and is applicable to the integrality of the described first of monitoring, the 2nd OAM agreement that described second communication network has the second communication agreement and is applicable to the integrality of described two parts of monitoring, described method comprises:
Utilize described the 2nd OAM agreement to detect fault in described second portion;
After detecting described fault, identification is used for the replacement path of described second portion in the second communication network, and the described second portion from the described communication link of described interface can be finished in described replacement path; And
For described communication link, in described interface, replace described second portion with described replacement link.
2. the method that is used to rebulid the connection of communication link according to claim 1, wherein:
Described first communication network is an atm network;
A described OAM agreement is a kind of among PNNI and the ATM OAM;
Described second communication network is the MPLS network; And
Described the 2nd OAM agreement is MPLS OAM.
3. the method that is used to rebulid the connection of communication link according to claim 2 is that the path is replaced in described second portion identification in described second communication network at described interface wherein.
4. the method that is used to rebulid the connection of communication link according to claim 3, the fault of wherein utilizing the 2nd OAM agreement to detect in second portion comprises that monitoring is used to receive the described second portion of the frame that comprises MPLS OAM information and described frame is eliminated shake.
5. the method that is used to rebulid the connection of communication link according to claim 4 is wherein by keeping and visit is used for that of described second portion replaces the tabulation in path and the replacement path that is used for described second portion in described second communication network identification.
6. the method that is used to rebulid the connection of communication link according to claim 5, a wherein said OAM agreement is applicable to the fault of detection in described second portion.
7. the method that is used to rebulid the connection of communication link according to claim 4 wherein further comprises:
Utilize described the 2nd OAM agreement to detect the removing situation of the described fault in described second portion;
After the removing that detects described fault, be described communication link, the second portion that is used in this interface replaces this replacement path.
8. network node.This node links to each other with the second communication network with first communication network, described network node is handled the communication that is used for communication link, this communication link has the first in described first communication network, second portion in described second communication network and be in interface between first and the second portion at described network node, the OAM agreement that described first communication network has first communication protocol and is applicable to the integrality of the described first of monitoring, the 2nd OAM agreement that described second communication network has the second communication agreement and is applicable to the integrality of the described second portion of monitoring, described node comprises:
Utilize the 2nd OAM agreement to detect fault in second portion;
Second module, after receiving fault, be applicable to the indication that receives described fault, so to discern the replacement path with second portion in described second communication network, the described second portion from the described communication link of described interface can be finished in described replacement path; And
Three module is applicable to the indication that receives described replacement path, is this communication link, replaces this second portion with the replacement path.
9. network node according to claim 8, wherein:
Described first communication network is an atm network;
A described OAM agreement is a kind of among PNNI and the ATM OAM;
Described second communication network is the MPLS network; And
Described the 2nd OAM agreement is MPLS OAM.
10. node according to claim 9, wherein:
Described first module is used for receiving the described second portion of the frame that comprises MPLS OAM information by monitoring and described frame is eliminated shake utilize described the 2nd OAM agreement to detect described fault at described second portion.
11. network node according to claim 10, wherein:
Described second module wherein further comprises a tabulation of replacing the path that is used for described second portion, to discern described replacement path.
12. network node according to claim 11, wherein:
Described first module is applicable to the removing situation of using described the 2nd OAM agreement to detect the described fault in described second portion; And
Described three module is applicable to after detecting described fault clearance and replaces this replacement path by the second portion that is used for communication link.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/015,573 | 2001-12-17 | ||
| US10/015,573 US7164652B2 (en) | 2001-12-17 | 2001-12-17 | System and method for detecting failures and re-routing connections in a communication network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1427581A true CN1427581A (en) | 2003-07-02 |
| CN100429889C CN100429889C (en) | 2008-10-29 |
Family
ID=21772210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021571449A Expired - Fee Related CN100429889C (en) | 2001-12-17 | 2002-12-16 | System and method for detecting failure and route reconnection in communication network |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US7164652B2 (en) |
| EP (1) | EP1324568A3 (en) |
| CN (1) | CN100429889C (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006099784A1 (en) * | 2005-03-25 | 2006-09-28 | Huawei Technologies Co., Ltd. | A method for detecting link fault between end-to-end nodes in a hybrid network |
| WO2008003213A1 (en) * | 2006-06-28 | 2008-01-10 | Huawei Technologies Co., Ltd. | A method of informing failure information based on bi-directional forwarding detection protocol and device |
| CN100366118C (en) * | 2004-11-17 | 2008-01-30 | 华为技术有限公司 | Method for maintaining and restoring link inspection |
| CN100403687C (en) * | 2005-03-29 | 2008-07-16 | 华为技术有限公司 | Method for realizing domain split management and protection in multi protocol label exchange network |
| CN101336530B (en) * | 2006-01-25 | 2011-05-11 | 株式会社日立制作所 | Network system |
| CN101355442B (en) * | 2007-07-24 | 2011-07-06 | 华为技术有限公司 | Display server and method for migrating state of subscribe status machine |
| CN102132524A (en) * | 2008-08-26 | 2011-07-20 | 阿尔卡特朗讯 | Methods for establishing a traffic connection and an associated monitoring connection |
| CN102771087A (en) * | 2010-02-22 | 2012-11-07 | 瑞典爱立信有限公司 | Fast LSP alert mechanism |
| CN103026663A (en) * | 2010-08-09 | 2013-04-03 | 西斯科技术公司 | Distributed connectivity verification protocol redundancy |
| CN103843293A (en) * | 2011-09-27 | 2014-06-04 | 日本电气株式会社 | Communication system, sending device, communication device, failure notification method and non-temporary computer-readable medium storing program |
| CN109901049A (en) * | 2019-01-29 | 2019-06-18 | 厦门码灵半导体技术有限公司 | Detect the method, apparatus of asynchronous paths in integrated circuit timing path |
| CN113260929A (en) * | 2019-01-23 | 2021-08-13 | 西门子股份公司 | Method, network node, computer program and computer-readable medium for fail-safe data transmission |
Families Citing this family (102)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7164652B2 (en) * | 2001-12-17 | 2007-01-16 | Alcatel Canada Inc. | System and method for detecting failures and re-routing connections in a communication network |
| EP1500236B1 (en) * | 2002-04-29 | 2008-05-07 | Nokia Siemens Networks Gmbh & Co. Kg | Method for monitoring the transmission quality of connections in mpls networks |
| JP3957065B2 (en) * | 2002-08-28 | 2007-08-08 | 富士通株式会社 | Network computer system and management device |
| FI122373B (en) * | 2002-10-24 | 2011-12-30 | Tellabs Oy | Procedure, arrangement and network elements detect a connection error |
| US7769873B1 (en) | 2002-10-25 | 2010-08-03 | Juniper Networks, Inc. | Dynamically inserting filters into forwarding paths of a network device |
| US7702810B1 (en) * | 2003-02-03 | 2010-04-20 | Juniper Networks, Inc. | Detecting a label-switched path outage using adjacency information |
| US7839891B1 (en) * | 2003-03-11 | 2010-11-23 | Nortel Networks Limited | Method for using a knowledge digest to verify configuration information in a network |
| US7689693B2 (en) * | 2003-03-31 | 2010-03-30 | Alcatel-Lucent Usa Inc. | Primary/restoration path calculation in mesh networks based on multiple-cost criteria |
| US8867333B2 (en) * | 2003-03-31 | 2014-10-21 | Alcatel Lucent | Restoration path calculation considering shared-risk link groups in mesh networks |
| US7451340B2 (en) * | 2003-03-31 | 2008-11-11 | Lucent Technologies Inc. | Connection set-up extension for restoration path establishment in mesh networks |
| US7646706B2 (en) * | 2003-03-31 | 2010-01-12 | Alcatel-Lucent Usa Inc. | Restoration time in mesh networks |
| US7545736B2 (en) * | 2003-03-31 | 2009-06-09 | Alcatel-Lucent Usa Inc. | Restoration path calculation in mesh networks |
| US7606237B2 (en) * | 2003-03-31 | 2009-10-20 | Alcatel-Lucent Usa Inc. | Sharing restoration path bandwidth in mesh networks |
| US8296407B2 (en) * | 2003-03-31 | 2012-10-23 | Alcatel Lucent | Calculation, representation, and maintenance of sharing information in mesh networks |
| US7643408B2 (en) * | 2003-03-31 | 2010-01-05 | Alcatel-Lucent Usa Inc. | Restoration time in networks |
| US7561527B1 (en) * | 2003-05-02 | 2009-07-14 | David Katz | Bidirectional forwarding detection |
| KR100887179B1 (en) * | 2003-05-27 | 2009-03-10 | 인터내셔널 비지네스 머신즈 코포레이션 | System for defining an alternate channel routing mechanism in a messaging middleware environment |
| US8078758B1 (en) | 2003-06-05 | 2011-12-13 | Juniper Networks, Inc. | Automatic configuration of source address filters within a network device |
| US8111612B2 (en) * | 2004-04-02 | 2012-02-07 | Alcatel Lucent | Link-based recovery with demand granularity in mesh networks |
| US7500013B2 (en) * | 2004-04-02 | 2009-03-03 | Alcatel-Lucent Usa Inc. | Calculation of link-detour paths in mesh networks |
| US20050226212A1 (en) * | 2004-04-02 | 2005-10-13 | Dziong Zbigniew M | Loop avoidance for recovery paths in mesh networks |
| US7856509B1 (en) | 2004-04-09 | 2010-12-21 | Juniper Networks, Inc. | Transparently providing layer two (L2) services across intermediate computer networks |
| US7965620B2 (en) * | 2004-05-25 | 2011-06-21 | Telcordia Licensing Company, Llc | Method, computer product and system for correlating events in a network |
| US7558263B1 (en) | 2004-08-30 | 2009-07-07 | Juniper Networks, Inc. | Reliable exchange of control information for multicast virtual private networks |
| US7489695B1 (en) | 2004-10-12 | 2009-02-10 | Juniper Networks, Inc. | Automatic LSP stitching with protocol signaling |
| US7539158B2 (en) | 2004-11-08 | 2009-05-26 | Lemko Corporation | System, method and device for providing communications using a distributed mobile architecture |
| CN100417080C (en) * | 2005-02-01 | 2008-09-03 | 华为技术有限公司 | Method for detecting network chain fault and positioning said fault |
| US7602702B1 (en) * | 2005-02-10 | 2009-10-13 | Juniper Networks, Inc | Fast reroute of traffic associated with a point to multi-point network tunnel |
| US8730814B2 (en) * | 2005-05-25 | 2014-05-20 | Alcatel Lucent | Communication network connection failure protection methods and systems |
| US7990965B1 (en) | 2005-07-28 | 2011-08-02 | Juniper Networks, Inc. | Transmission of layer two (L2) multicast traffic over multi-protocol label switching networks |
| US9166807B2 (en) * | 2005-07-28 | 2015-10-20 | Juniper Networks, Inc. | Transmission of layer two (L2) multicast traffic over multi-protocol label switching networks |
| US7564803B1 (en) | 2005-08-29 | 2009-07-21 | Juniper Networks, Inc. | Point to multi-point label switched paths with label distribution protocol |
| KR100696176B1 (en) * | 2005-12-09 | 2007-03-20 | 한국전자통신연구원 | Apparatus and method for MPLS LSP protection switching |
| US7715307B2 (en) * | 2005-12-13 | 2010-05-11 | Alcatel Lucent | Communication connection control systems and methods |
| US7839850B2 (en) * | 2006-01-30 | 2010-11-23 | Juniper Networks, Inc. | Forming equal cost multipath multicast distribution structures |
| US8270395B2 (en) * | 2006-01-30 | 2012-09-18 | Juniper Networks, Inc. | Forming multicast distribution structures using exchanged multicast optimization data |
| US7856233B2 (en) | 2006-03-30 | 2010-12-21 | Lemko Corporation | System, method, and device for providing communications using a distributed mobile architecture |
| CN1852183A (en) * | 2006-04-18 | 2006-10-25 | 华为技术有限公司 | Method and apparatus for detecting counter defect indication-path condition |
| CN100456697C (en) * | 2006-04-20 | 2009-01-28 | 华为技术有限公司 | Method and system for configuring two-way converting inspection automatically |
| US8224322B2 (en) | 2006-06-12 | 2012-07-17 | Lemko Corporation | Roaming mobile subscriber registration in a distributed mobile architecture |
| US7787380B1 (en) | 2006-06-30 | 2010-08-31 | Juniper Networks, Inc. | Resource reservation protocol with traffic engineering point to multi-point label switched path hierarchy |
| US7742482B1 (en) | 2006-06-30 | 2010-06-22 | Juniper Networks, Inc. | Upstream label assignment for the resource reservation protocol with traffic engineering |
| US7839862B1 (en) | 2006-06-30 | 2010-11-23 | Juniper Networks, Inc. | Upstream label assignment for the label distribution protocol |
| US8676197B2 (en) | 2006-12-13 | 2014-03-18 | Lemko Corporation | System, method, and device to control wireless communications |
| US7724676B2 (en) * | 2007-03-21 | 2010-05-25 | Cisco Technology, Inc. | Proactive protection mechanism based on advanced failure warning |
| US8472325B2 (en) * | 2007-05-10 | 2013-06-25 | Futurewei Technologies, Inc. | Network availability enhancement technique for packet transport networks |
| CN101316225B (en) * | 2007-05-30 | 2012-12-12 | 华为技术有限公司 | Fault detection method, communication system and label exchange router |
| US8711676B2 (en) | 2007-08-02 | 2014-04-29 | Foundry Networks, Llc | Techniques for determining optimized local repair paths |
| US8040792B2 (en) * | 2007-08-02 | 2011-10-18 | Foundry Networks, Llc | Techniques for determining local repair connections |
| US7958183B2 (en) | 2007-08-27 | 2011-06-07 | International Business Machines Corporation | Performing collective operations using software setup and partial software execution at leaf nodes in a multi-tiered full-graph interconnect architecture |
| US7769891B2 (en) * | 2007-08-27 | 2010-08-03 | International Business Machines Corporation | System and method for providing multiple redundant direct routes between supernodes of a multi-tiered full-graph interconnect architecture |
| US8140731B2 (en) | 2007-08-27 | 2012-03-20 | International Business Machines Corporation | System for data processing using a multi-tiered full-graph interconnect architecture |
| US7904590B2 (en) | 2007-08-27 | 2011-03-08 | International Business Machines Corporation | Routing information through a data processing system implementing a multi-tiered full-graph interconnect architecture |
| US7769892B2 (en) | 2007-08-27 | 2010-08-03 | International Business Machines Corporation | System and method for handling indirect routing of information between supernodes of a multi-tiered full-graph interconnect architecture |
| US7958182B2 (en) | 2007-08-27 | 2011-06-07 | International Business Machines Corporation | Providing full hardware support of collective operations in a multi-tiered full-graph interconnect architecture |
| US8014387B2 (en) * | 2007-08-27 | 2011-09-06 | International Business Machines Corporation | Providing a fully non-blocking switch in a supernode of a multi-tiered full-graph interconnect architecture |
| US7822889B2 (en) * | 2007-08-27 | 2010-10-26 | International Business Machines Corporation | Direct/indirect transmission of information using a multi-tiered full-graph interconnect architecture |
| US8185896B2 (en) | 2007-08-27 | 2012-05-22 | International Business Machines Corporation | Method for data processing using a multi-tiered full-graph interconnect architecture |
| US7793158B2 (en) * | 2007-08-27 | 2010-09-07 | International Business Machines Corporation | Providing reliability of communication between supernodes of a multi-tiered full-graph interconnect architecture |
| US8108545B2 (en) | 2007-08-27 | 2012-01-31 | International Business Machines Corporation | Packet coalescing in virtual channels of a data processing system in a multi-tiered full-graph interconnect architecture |
| US7809970B2 (en) * | 2007-08-27 | 2010-10-05 | International Business Machines Corporation | System and method for providing a high-speed message passing interface for barrier operations in a multi-tiered full-graph interconnect architecture |
| US7840703B2 (en) * | 2007-08-27 | 2010-11-23 | International Business Machines Corporation | System and method for dynamically supporting indirect routing within a multi-tiered full-graph interconnect architecture |
| US7827428B2 (en) | 2007-08-31 | 2010-11-02 | International Business Machines Corporation | System for providing a cluster-wide system clock in a multi-tiered full-graph interconnect architecture |
| US7921316B2 (en) | 2007-09-11 | 2011-04-05 | International Business Machines Corporation | Cluster-wide system clock in a multi-tiered full-graph interconnect architecture |
| US8358576B2 (en) * | 2007-10-03 | 2013-01-22 | Foundry Networks, Llc | Techniques for determining local repair paths using CSPF |
| US8125926B1 (en) | 2007-10-16 | 2012-02-28 | Juniper Networks, Inc. | Inter-autonomous system (AS) virtual private local area network service (VPLS) |
| US20090198956A1 (en) * | 2008-02-01 | 2009-08-06 | Arimilli Lakshminarayana B | System and Method for Data Processing Using a Low-Cost Two-Tier Full-Graph Interconnect Architecture |
| US7779148B2 (en) | 2008-02-01 | 2010-08-17 | International Business Machines Corporation | Dynamic routing based on information of not responded active source requests quantity received in broadcast heartbeat signal and stored in local data structure for other processor chips |
| US8077602B2 (en) * | 2008-02-01 | 2011-12-13 | International Business Machines Corporation | Performing dynamic request routing based on broadcast queue depths |
| US7936780B1 (en) | 2008-03-12 | 2011-05-03 | Juniper Networks, Inc. | Hierarchical label distribution protocol for computer networks |
| US8046420B2 (en) | 2008-04-23 | 2011-10-25 | Lemko Corporation | System and method to control wireless communications |
| US8340667B2 (en) | 2008-06-26 | 2012-12-25 | Lemko Corporation | System and method to control wireless communications |
| US8706105B2 (en) | 2008-06-27 | 2014-04-22 | Lemko Corporation | Fault tolerant distributed mobile architecture |
| US8107409B2 (en) | 2008-07-11 | 2012-01-31 | Lemko Corporation | OAMP for distributed mobile architecture |
| US7855988B2 (en) | 2008-07-14 | 2010-12-21 | Lemko Corporation | System, method, and device for routing calls using a distributed mobile architecture |
| US7979066B2 (en) | 2008-09-25 | 2011-07-12 | Lemko Corporation | Multiple IMSI connections |
| US7929557B2 (en) * | 2008-11-14 | 2011-04-19 | Juniper Networks, Inc. | Summarization and longest-prefix match within MPLS networks |
| US8077726B1 (en) | 2008-12-10 | 2011-12-13 | Juniper Networks, Inc. | Fast reroute for multiple label switched paths sharing a single interface |
| US8630164B2 (en) * | 2009-08-04 | 2014-01-14 | At&T Intellectual Property I, L.P. | Methods and apparatus to respond to signaling protocol failures in traffic engineering tunnels |
| WO2011066997A1 (en) | 2009-12-01 | 2011-06-09 | Telefonaktiebolaget L M Ericsson (Publ) | Fault monitoring in connection-oriented networks |
| US8417778B2 (en) * | 2009-12-17 | 2013-04-09 | International Business Machines Corporation | Collective acceleration unit tree flow control and retransmit |
| US8422514B1 (en) | 2010-02-09 | 2013-04-16 | Juniper Networks, Inc. | Dynamic configuration of cross-domain pseudowires |
| CA2790247A1 (en) * | 2010-02-19 | 2011-08-25 | David Berechya | Method and device for conveying oam messages across an inter-carrier network |
| US8467289B2 (en) * | 2010-02-22 | 2013-06-18 | Telefonaktiebolaget L M Ericsson (Publ) | Optimized fast re-route in MPLS ring topologies |
| US8310957B1 (en) | 2010-03-09 | 2012-11-13 | Juniper Networks, Inc. | Minimum-cost spanning trees of unicast tunnels for multicast distribution |
| US8976680B2 (en) | 2010-03-15 | 2015-03-10 | Juniper Networks, Inc. | Operations, administration, and management fields for packet transport |
| US8588081B2 (en) * | 2010-07-14 | 2013-11-19 | Cisco Technology, Inc. | Monitoring a flow set to detect faults |
| EP2461501A1 (en) * | 2010-12-01 | 2012-06-06 | Alcatel Lucent | Tunnel follow-up message for transparent clock |
| US9246838B1 (en) | 2011-05-27 | 2016-01-26 | Juniper Networks, Inc. | Label switched path setup using fast reroute bypass tunnel |
| US9100213B1 (en) | 2011-06-08 | 2015-08-04 | Juniper Networks, Inc. | Synchronizing VPLS gateway MAC addresses |
| US9356859B2 (en) | 2011-08-16 | 2016-05-31 | Brocade Communications Systems, Inc. | Techniques for performing a failover from a protected connection to a backup connection |
| WO2013048393A1 (en) | 2011-09-28 | 2013-04-04 | Hewlett-Packard Development Company, L.P. | Managing a switch fabric |
| US9479391B2 (en) | 2011-09-28 | 2016-10-25 | Hewlett Packard Enterprise Development Lp | Implementing a switch fabric responsive to an unavailable path |
| US9391833B2 (en) * | 2011-11-23 | 2016-07-12 | Verizon Patent And Licensing Inc. | Fault signaling for ethernet |
| US8837479B1 (en) | 2012-06-27 | 2014-09-16 | Juniper Networks, Inc. | Fast reroute between redundant multicast streams |
| US9049148B1 (en) | 2012-09-28 | 2015-06-02 | Juniper Networks, Inc. | Dynamic forwarding plane reconfiguration in a network device |
| US20140258772A1 (en) * | 2013-03-07 | 2014-09-11 | Fujitsu Limited | Utilizing backward defect indications in y-cable protection switching |
| US8953500B1 (en) | 2013-03-29 | 2015-02-10 | Juniper Networks, Inc. | Branch node-initiated point to multi-point label switched path signaling with centralized path computation |
| US9806895B1 (en) | 2015-02-27 | 2017-10-31 | Juniper Networks, Inc. | Fast reroute of redundant multicast streams |
| CN107086956A (en) * | 2017-05-27 | 2017-08-22 | 烽火通信科技股份有限公司 | A kind of implementation method of Ethernet pretection switch |
| US10469367B2 (en) * | 2017-10-04 | 2019-11-05 | Cisco Technology, Inc. | Segment routing network processing of packets including operations signaling and processing of packets in manners providing processing and/or memory efficiencies |
| US11588547B2 (en) * | 2020-10-28 | 2023-02-21 | Huawei Technologies Co., Ltd. | Seam abstraction in communications networks |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4416718C2 (en) * | 1994-05-11 | 1997-08-21 | Siemens Ag | Circuit arrangement for the trouble-free rerouting of a message cell stream to an alternative path |
| US6064650A (en) * | 1996-06-27 | 2000-05-16 | Xerox Corporation | Rate shaping in per-flow output queued routing mechanisms having output links servicing multiple physical layers |
| US5926459A (en) * | 1996-06-27 | 1999-07-20 | Xerox Corporation | Rate shaping in per-flow queued routing mechanisms for available bit rate service |
| JP3435293B2 (en) * | 1996-09-10 | 2003-08-11 | 株式会社東芝 | Packet scheduling apparatus and packet transfer method |
| JP2885746B2 (en) | 1996-12-18 | 1999-04-26 | 静岡日本電気株式会社 | Radio selective call receiver |
| US6011780A (en) * | 1997-05-23 | 2000-01-04 | Stevens Institute Of Technology | Transparant non-disruptable ATM network |
| US6094435A (en) * | 1997-06-30 | 2000-07-25 | Sun Microsystems, Inc. | System and method for a quality of service in a multi-layer network element |
| US6072772A (en) * | 1998-01-12 | 2000-06-06 | Cabletron Systems, Inc. | Method for providing bandwidth and delay guarantees in a crossbar switch with speedup |
| US7002906B1 (en) * | 1998-08-28 | 2006-02-21 | Cisco Technology, Inc. | Method for extending the crankback procedure to any Asynchronous Transfer Mode system |
| JP4031894B2 (en) * | 1999-10-29 | 2008-01-09 | 富士通株式会社 | Communication data confirmation test method in MPLS communication system and router, exchange and communication system using the method |
| WO2002065607A1 (en) * | 2001-02-12 | 2002-08-22 | Maple Optical Systems, Inc. | Multiple level fault protection in a communications network |
| US8199649B2 (en) * | 2001-03-28 | 2012-06-12 | Alcatel Lucent | Method and apparatus for rerouting a connection in a data communication network based on a user connection monitoring function |
| US7289428B2 (en) * | 2001-08-13 | 2007-10-30 | Tellabs Operations, Inc. | Inter-working mesh telecommunications networks |
| US7164652B2 (en) * | 2001-12-17 | 2007-01-16 | Alcatel Canada Inc. | System and method for detecting failures and re-routing connections in a communication network |
-
2001
- 2001-12-17 US US10/015,573 patent/US7164652B2/en not_active Expired - Fee Related
-
2002
- 2002-12-10 EP EP02293053A patent/EP1324568A3/en not_active Withdrawn
- 2002-12-16 CN CNB021571449A patent/CN100429889C/en not_active Expired - Fee Related
-
2006
- 2006-12-08 US US11/635,534 patent/US7778163B2/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366118C (en) * | 2004-11-17 | 2008-01-30 | 华为技术有限公司 | Method for maintaining and restoring link inspection |
| CN100389571C (en) * | 2005-03-25 | 2008-05-21 | 华为技术有限公司 | Method for detecting chain circuit fault between end-to-end notes in mixed network |
| WO2006099784A1 (en) * | 2005-03-25 | 2006-09-28 | Huawei Technologies Co., Ltd. | A method for detecting link fault between end-to-end nodes in a hybrid network |
| CN100403687C (en) * | 2005-03-29 | 2008-07-16 | 华为技术有限公司 | Method for realizing domain split management and protection in multi protocol label exchange network |
| US7768925B2 (en) | 2005-03-29 | 2010-08-03 | Huawei Technologies Co., Ltd. | Method of domain supervision and protection in label switched network |
| CN101336530B (en) * | 2006-01-25 | 2011-05-11 | 株式会社日立制作所 | Network system |
| WO2008003213A1 (en) * | 2006-06-28 | 2008-01-10 | Huawei Technologies Co., Ltd. | A method of informing failure information based on bi-directional forwarding detection protocol and device |
| CN100459531C (en) * | 2006-06-28 | 2009-02-04 | 华为技术有限公司 | Method for notifying pseudo-lines fault based on bidirectional transmission detecting protocol |
| CN101355442B (en) * | 2007-07-24 | 2011-07-06 | 华为技术有限公司 | Display server and method for migrating state of subscribe status machine |
| CN102132524B (en) * | 2008-08-26 | 2014-03-26 | 阿尔卡特朗讯 | Methods for establishing a traffic connection and an associated monitoring connection |
| CN102132524A (en) * | 2008-08-26 | 2011-07-20 | 阿尔卡特朗讯 | Methods for establishing a traffic connection and an associated monitoring connection |
| CN102771087A (en) * | 2010-02-22 | 2012-11-07 | 瑞典爱立信有限公司 | Fast LSP alert mechanism |
| CN102771087B (en) * | 2010-02-22 | 2015-09-09 | 瑞典爱立信有限公司 | Fast LSP alert mechanism |
| CN103026663A (en) * | 2010-08-09 | 2013-04-03 | 西斯科技术公司 | Distributed connectivity verification protocol redundancy |
| CN103026663B (en) * | 2010-08-09 | 2016-01-13 | 西斯科技术公司 | Distributed connectivity verification protocol redundancy |
| CN103843293A (en) * | 2011-09-27 | 2014-06-04 | 日本电气株式会社 | Communication system, sending device, communication device, failure notification method and non-temporary computer-readable medium storing program |
| CN103843293B (en) * | 2011-09-27 | 2017-03-08 | 日本电气株式会社 | The non-emporary computer-readable medium of communication system, transmitting device, communicator, failure notification method and storage program |
| CN113260929A (en) * | 2019-01-23 | 2021-08-13 | 西门子股份公司 | Method, network node, computer program and computer-readable medium for fail-safe data transmission |
| CN113260929B (en) * | 2019-01-23 | 2024-05-24 | 西门子股份公司 | Method, network node, computer program and computer readable medium for failsafe data transmission |
| CN109901049A (en) * | 2019-01-29 | 2019-06-18 | 厦门码灵半导体技术有限公司 | Detect the method, apparatus of asynchronous paths in integrated circuit timing path |
| CN109901049B (en) * | 2019-01-29 | 2021-05-04 | 厦门码灵半导体技术有限公司 | Method and device for detecting asynchronous path in time sequence path for integrated circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| US7778163B2 (en) | 2010-08-17 |
| US7164652B2 (en) | 2007-01-16 |
| EP1324568A2 (en) | 2003-07-02 |
| EP1324568A3 (en) | 2009-12-23 |
| US20070081465A1 (en) | 2007-04-12 |
| US20030112748A1 (en) | 2003-06-19 |
| CN100429889C (en) | 2008-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1427581A (en) | System and method for detecting failure and route reconnection in communication network | |
| EP1320219B1 (en) | System and method for transmission of operations, administration and maintenance packets between ATM and switching networks upon failures | |
| US7180866B1 (en) | Rerouting in connection-oriented communication networks and communication systems | |
| CN1277375C (en) | Switching method between permanent connection and exchage connection in optical network | |
| CN100450039C (en) | Fast convergence method and device of the end-to-end service | |
| CN1658595A (en) | Method for rerouting MPLS traffic in ring networks | |
| US20060203720A1 (en) | Data relay apparatus and data relay method | |
| CN1805408A (en) | Quick route switching method and apparatus for network node devices | |
| CN1159267A (en) | Method for rerouting packet-mode data connection | |
| CN102474446A (en) | Recovery mechanism for point-to-multipoint traffic | |
| JP2002111741A (en) | Method and system for transferring information in optical communication network | |
| EP1501246B1 (en) | Network data re-routing | |
| CN1505409A (en) | Rerouting method based on network entrance node | |
| CN1812401A (en) | Method for establishing return tag exchange route in multiprotocol tag exchange system | |
| CN1571301A (en) | Apparatus and method for implementing parallel optimized signal receiving via route display in optical network | |
| CN1756182A (en) | Protection switching method in multiprotocol label switching system | |
| CN100352223C (en) | Method for protecting data service in metropolitan area transmission network | |
| CN1812360A (en) | Intelligent optical network business re-routing trigging method | |
| CN1866764A (en) | Multicast service path protecting method and system | |
| CN1531834A (en) | ATM over MPLS connection establishment mechanism | |
| EP1168714A2 (en) | Redundant channels over a packet network | |
| CN101192959B (en) | A recovery method for multicast service connection in automatic switching optical network | |
| CN101860769A (en) | Method, device and system for fusing IP and light | |
| CN101043433A (en) | Method for aging MAC address learning list of bridge mode resilient packet ring | |
| CN1738213A (en) | Method for preventing error connection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081029 Termination date: 20171216 |